bunnell



M. G. B-UNNELL STGNE 'GRUSHER 4. Sheets-Sheet 1..

(N0 Model.)

Patented Jan. 2, 1894'.

(No Mode-1.) 1 4 Sheets-Sheet 2. M. G. BUNNBLL. STONE CRUSHBR.

i Patented Jan. 2, 1894.

QA@ f Q @ZL/@ M.G;BUNNELL STONE GRUSHBR,

, Patented Jan. Z, 1894.v

a N0"511,Q98,

(No Model.) d 4 Sheets-Sheet 4.

M. Gr. BUNNBLL. STONE GRUSHER. No. 511,998. Patented Jan. 2,1894.

UrviTED STATES MORTON G. BUNNELL, OF CHICAGO, ILLINOIS, ASSIGNOR 'TO FREDERICK C. AUSTIN, OF SAME PLACE.

STONE-CRUSHER.

SPECIFICATION forming part of Letters Patent No. 511,998, dated January, 1894.

Application tiled April 11I 1893. Serial No.' 69.910. (No model.)

To a/ZZ whom t may concern:

. Be it known that I, MoRToN G. BUNNELL, a citizen of the United States,l residing at Chicago, in the county of Cook and State of Illinois, have inventeda certain new and useful Improvement in Stone-Crushers, of which the following is a specification.

In a stone Crusher characterized by my invention, the stone is crushed between the oppositely arranged crushing walls of a hopper, whereof one of said walls has a reciprocating compound motion which while serving to bring it toward the opposite Wall in order to squeeze and crush the stone between the two, also serves to simultaneously therewith move it in the direction of the feed or progress of the stone through the hopper. By such operation a powerful, rapid and eective crushing action is attained, and the disposition of stonesto shoot upwardly and out from the hopper when a mass of broken stone is squeezed between the walls is counteracted. This movable crushing wall maybe termed the vibratory front crushing wall of the hopper in contradistinction to the opposite stationary wall which may be termed the back or rear wall, said terms being also convenient for the purpose of distinguishing said two walls from the two remaining walls which may be termed the side walls of the hopper. Said vibratory crushing wall is rigid with the. side walls, which latter are hung at the upper corners of the rear stationary wall, by which arrangement a simple and efficient construction is provided and the aforesaid compound movement of the vibratory front crushing wall is secured in an extremely simple, reliable and eective way. Power for operating the vibratory crushing wall is arranged opposite the same, and to such end I provide a short crank-arm or pitman which is at one end operated by arotary eccentric and at its opposite end pivotally connected with the lower portion of the vibratory crushing wall. I also arrange for shifting this hinged or pivotal connection between the pitman and vibratory crushing wall, so that when the pivotal con nection is low down a short powerful stroke can be secured, while on the other hand, by shifting such pivotal connection higher up, a longer and lesspowerful stroke can be attained for easier and morerapid work.

In the accompanying drawings,-Figure 1 represents in side elevation a stone crusher involving the principles of my invention, a

portion of one end of the machine beingbroken away for convenience of illustration, and the base support or foundation being for like reason indicated in dotted lines. Fig. 2

is a top plan View of thev machine, a portion of one end being broken away for convenience of illustration. Fig. 3 is a longitudinal central section on line :1cthrough the machine. Fig. 4 is a like view on a smaller scale, illustrating rneans for varying the stroke and power of the vibratory crushing wall.

The hopper comprises the stationary back or rear crushing wall A, and a vibratory portion composed of the front crushing Wall B and the side walls C, which latter are rigid with the front crushing wall and pivotally hung at the upper corners or upper portion of the rear stationary crushing wall. By such arrangement the front crushing wall vibrates about a horizontal axis arranged across the rear portion of the hopper, and as a result of thus positioning said axis, the vibratory front wall has a compound movement, that is to say-during its downward swing, it also closes or movestoward the rear stationary crushing wall. Said rear wall A is suitably inclined and is embraced between the side walls which latter while moving with the front wall B, close the hopper at its sides and at the same time afford efficient means for hanging the front wall from an elevated axis at the rear rear of the hopper. The stationary wall--so called because it is stationary during opera tion-is however adjustable toward and away from the front wall, and to such end it is hung upon a pivot D and backed near its lower portion by some suitable adjusting device, such for example as an adjustable screw E supported by a suitable bearing f upon the bed-frame F. The sides C are also conveniently hung upon said pivot D which latter is in turn supported by sides f on the bedfralne, thereby providing a simple and compact arrangement.

The pitman G is pivotally connected with the vibratory front crushing wall of the hopper, and is operated by an eccentric H on a rotary power driven shaft I. The shaft I is arranged opposite' the vibratory front of the hopper and the pitman is arranged for operation directly between said shaft and the vibratory Crusher wall which it serves to operate, thereby insuring. rapidity of action and great power. The hopper and pitman are arranged between the sides f of the bed.- frame, said sides being provided at one end of the frame with bearingsf2 for the axle or pivot D, and being at the opposite en d of the frame provided with boxes f3 for the shaft H which carries the eccentric. The con nection between the pitman and vibratory front crushing wall can be adjusted in height relatively to the lower end of said wall, and to such end said wall is in Fig. 4: provided with a plurality of bearings b for the pintle b by which the pitman is hinged to the'vibratory crushing wall. Thepitmanisdesirablyformed by4 a broad stout arm or bar as best shown in Fig. 2 and the bearings b2 for the pintle are preferably arranged in line along the Wall as illustrated in Fig. 2.

The vibratory side or wallB of the hopper can be constructed in any-desired way, but is preferably constructed with a hardened corrugated crushing face-portion b3 bolted to the main portion b4 of the wall with an intervening layer b5 of Babbitt metal or the like. The stationary wall A is also desirably provided 4o with a corrugated crushing surface, the illustration of the opposing corrugated crushing surfaces being found in Fig. 2.

What I claim as my invention isl. In a ston e-crusher, the hopper comprising a stationary portion forming the rear crush- .ing wall, and a vibratory portion forming the front crushing wall and two sides C, said vibratory portion beinghung at the upper rear portion of the hopper, substantially as and for the purpose described. 1

2. In astone-crusher, the hopper comprising a vibratory front crushing wall hung to vibrate about an axis which is arranged at the upper rear stationary portion of the hopper, and a crank-arm or pitman G and means for operating the same arranged at the front side of the hopper and connected' with the vibratory frontcrushing wall, substantially as described.

3. A stone-crusher comprising the rear stationary crushing Wall A, the vibratory front crushing wall B united to sides C which are hung at the upper rear portion of the hopper, the rotary shaft provided with an eccentric and arranged in front of the vibratory front crushing wall, and the pitman Gr connecting the eccentric with said vibratory front crushing wall, substantially as described.

4. In a stone crusher, the combination of the vibratory front crushing wall of the hopper hung so as to vibrate about an axis arranged at the upper rear stationary portion of the hopper, and the pitman adjustably connected with said vibratory front crushing wall whereby the connection between the two can be varied in height, substantially as described. MORTON G. BUNNELL.

Witnesses:

W. D. MIDDLETON, RE'rA M. WAGNER. 

